000 00319nam a2200121Ia 4500
008 220217s9999||||xx |||||||||||||| ||und||
082 _a628 PRA
100 _aPrakash S M
245 0 _aEnvironmental studies
260 _aElite publishers
_bNew Delhi
_c2007
300 _b160
650 _aENVIRONMENTAL STUDIES
_9107
999 _c175622
_d175622